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  3. Mineral Resource Data System (MRDS)

Misty Mountain

Occurrence in Alaska, United States with commodities Gold, Mercury
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Alteration
  8. Mineral occurrence model information
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Mining district
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10005729
MRDS ID A106006
Record type Site
Current site name Misty Mountain

Geographic coordinates

Geographic coordinates: -166.44406, 53.87661 (WGS84)
Relative position Locality is southeast of Summer Bay lake and is accurate.

Site location context

Political divisions (FIPS codes)

Aleutians West(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Unalaska C-2(quadrangle 1:63,360 scale)

Unalaska NE(quadrangle 1:100,000 scale)

Unalaska SE(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Fox Islands(hydrologic unit)

Aleutian Islands(hydrologic accounting unit)

Southwest(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Ounalashka Corporation(ANCSA Village)

ANCSA Village NTVPIC(Type of land area)

NTVPIC(Federal land areas administered by NTVPIC)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Mercury Secondary

Materials information

Materials Type of material
Arsenopyrite Ore
Gold Ore
Quartz Gangue

Alteration

  • (Local) Regional propylitic alteration; no apparent wall-rock alteration around vein.

Mineral occurrence model information

Model code 105
USGS model code 25a-d
Deposit model name Epithermal vein, generic
Mark3 model number 119

Nearby scientific data

(1) -166.44406, 53.87661
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = This occurrence is primarily a very high ( more than 40 colors per pan) gold pan concentrate anomaly. Country rocks are strongly propylitically altered andesitic tuffs and flows capped by unaltered basaltic volcanic rocks. The andesitic rocks host a wide-spaced cockscomb quartz vein system containing rare arsenopyrite. 'The veining appears to be controlled by several shear zones that developed in response to large-scale faulting (Randolph, 1991).' Battle Mountain Exploration considered source of pan concentrate anomaly indeterminate as their fieldwork was unable to delineate a source. A ridge to the north of the occurrence hosts several wide-spaced quartz vein systems; however, sampling did not locate highly anomalous areas.
  • Age = Late Tertiary or younger

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Aleutians

Comments on the workings information

  • Workings / Exploration = Pan concentrate, rock, and soil sampling by BMEC. Rock sampling was of andesitic rocks cut by quartz veins in the stream basin. Highest gold from these rocks was 168 ppb, pan concentrate from the basin yielded 170 ppb Au and 930 ppb Hg.

Reference information

Bibliographic references

  • Deposit

    Randolph, D.B., 1991, Unalaska project, 1990 final report: Battle Mountain Exploration Company, Alaska District, 62 p., 5 appendices, 15 plates, various scales. (Report held by the Aleut Corporation, Anchorage, Alaska.)

Comments on the references

  • Primary Reference = Randolph, 1991

General comments

Subject category Comment text
Deposit Model Name = Epithermal gold vein

Reporter information

Type Date Name Affiliation Comment
Reporter 18-DEC-1992 F.H. Wilson U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.